1 /***************************************************************************
2 * Copyright (C) 2005-09 by the Quassel Project *
3 * devel@quassel-irc.org *
5 * This program is free software; you can redistribute it and/or modify *
6 * it under the terms of the GNU General Public License as published by *
7 * the Free Software Foundation; either version 2 of the License, or *
8 * (at your option) version 3. *
10 * This program is distributed in the hope that it will be useful, *
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of *
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13 * GNU General Public License for more details. *
15 * You should have received a copy of the GNU General Public License *
16 * along with this program; if not, write to the *
17 * Free Software Foundation, Inc., *
18 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. *
19 ***************************************************************************/
21 #include <QGraphicsTextItem>
26 #include "bufferwidget.h"
27 #include "chatscene.h"
30 #include "messagefilter.h"
32 #include "qtuistyle.h"
33 #include "clientignorelistmanager.h"
35 ChatView::ChatView(BufferId bufferId, QWidget *parent)
36 : QGraphicsView(parent),
39 _currentScaleFactor(1)
41 QList<BufferId> filterList;
42 filterList.append(bufferId);
43 MessageFilter *filter = new MessageFilter(Client::messageModel(), filterList, this);
47 ChatView::ChatView(MessageFilter *filter, QWidget *parent)
48 : QGraphicsView(parent),
51 _currentScaleFactor(1)
56 void ChatView::init(MessageFilter *filter) {
57 setHorizontalScrollBarPolicy(Qt::ScrollBarAlwaysOff);
58 setAlignment(Qt::AlignBottom);
60 //setOptimizationFlags(QGraphicsView::DontClipPainter | QGraphicsView::DontAdjustForAntialiasing);
61 // setOptimizationFlags(QGraphicsView::DontAdjustForAntialiasing);
62 setViewportUpdateMode(QGraphicsView::BoundingRectViewportUpdate);
63 // setTransformationAnchor(QGraphicsView::NoAnchor);
64 setTransformationAnchor(QGraphicsView::AnchorViewCenter);
66 _scrollTimer.setInterval(100);
67 _scrollTimer.setSingleShot(true);
68 connect(&_scrollTimer, SIGNAL(timeout()), SLOT(scrollTimerTimeout()));
70 _scene = new ChatScene(filter, filter->idString(), viewport()->width() - 4, this); // see below: resizeEvent()
71 connect(_scene, SIGNAL(sceneRectChanged(const QRectF &)), this, SLOT(sceneRectChanged(const QRectF &)));
72 connect(_scene, SIGNAL(lastLineChanged(QGraphicsItem *, qreal)), this, SLOT(lastLineChanged(QGraphicsItem *, qreal)));
73 connect(_scene, SIGNAL(mouseMoveWhileSelecting(const QPointF &)), this, SLOT(mouseMoveWhileSelecting(const QPointF &)));
76 connect(verticalScrollBar(), SIGNAL(valueChanged(int)), this, SLOT(verticalScrollbarChanged(int)));
78 // only connect if client is synched with a core
79 if(Client::isSynced())
80 connect(Client::ignoreListManager(), SIGNAL(ignoreListChanged()), filter, SLOT(invalidateFilter()));
83 bool ChatView::event(QEvent *event) {
84 if(event->type() == QEvent::KeyPress) {
85 QKeyEvent *keyEvent = static_cast<QKeyEvent*>(event);
86 switch(keyEvent->key()) {
90 case Qt::Key_PageDown:
91 if(!verticalScrollBar()->isVisible()) {
92 scene()->requestBacklog();
100 if(event->type() == QEvent::Wheel) {
101 if(!verticalScrollBar()->isVisible()) {
102 scene()->requestBacklog();
107 return QGraphicsView::event(event);
110 void ChatView::resizeEvent(QResizeEvent *event) {
111 QGraphicsView::resizeEvent(event);
113 // we can reduce viewport updates if we scroll to the bottom allready at the beginning
114 verticalScrollBar()->setValue(verticalScrollBar()->maximum());
116 // FIXME: without the hardcoded -4 Qt reserves space for a horizontal scrollbar even though it's disabled permanently.
117 // this does only occur on QtX11 (at least not on Qt for Mac OS). Seems like a Qt Bug.
118 scene()->updateForViewport(viewport()->width() - 4, viewport()->height());
120 _lastScrollbarPos = verticalScrollBar()->maximum();
121 verticalScrollBar()->setValue(verticalScrollBar()->maximum());
124 void ChatView::mouseMoveWhileSelecting(const QPointF &scenePos) {
125 int y = (int)mapFromScene(scenePos).y();
129 else if(y > height())
130 _scrollOffset = y - height();
132 if(_scrollOffset && !_scrollTimer.isActive())
133 _scrollTimer.start();
136 void ChatView::scrollTimerTimeout() {
138 QAbstractSlider *vbar = verticalScrollBar();
139 if(_scrollOffset < 0 && vbar->value() > 0)
140 vbar->setValue(qMax(vbar->value() + _scrollOffset, 0));
141 else if(_scrollOffset > 0 && vbar->value() < vbar->maximum())
142 vbar->setValue(qMin(vbar->value() + _scrollOffset, vbar->maximum()));
145 void ChatView::lastLineChanged(QGraphicsItem *chatLine, qreal offset) {
147 // disabled until further testing/discussion
148 //if(!scene()->isScrollingAllowed())
151 QAbstractSlider *vbar = verticalScrollBar();
153 if(vbar->maximum() - vbar->value() <= (offset + 5) * _currentScaleFactor ) { // 5px grace area
154 vbar->setValue(vbar->maximum());
158 void ChatView::verticalScrollbarChanged(int newPos) {
159 QAbstractSlider *vbar = verticalScrollBar();
162 // check for backlog request
163 if(newPos < _lastScrollbarPos) {
164 int relativePos = 100;
165 if(vbar->maximum() - vbar->minimum() != 0)
166 relativePos = (newPos - vbar->minimum()) * 100 / (vbar->maximum() - vbar->minimum());
168 if(relativePos < 20) {
169 scene()->requestBacklog();
172 _lastScrollbarPos = newPos;
174 // FIXME: Fugly workaround for the ChatView scrolling up 1px on buffer switch
175 if(vbar->maximum() - newPos <= 2)
176 vbar->setValue(vbar->maximum());
179 MsgId ChatView::lastMsgId() const {
183 QAbstractItemModel *model = scene()->model();
184 if(!model || model->rowCount() == 0)
187 return model->data(model->index(model->rowCount() - 1, 0), MessageModel::MsgIdRole).value<MsgId>();
190 void ChatView::addActionsToMenu(QMenu *menu, const QPointF &pos) {
192 BufferWidget *bw = qobject_cast<BufferWidget *>(bufferContainer());
194 bw->addActionsToMenu(menu, pos);
195 menu->addSeparator();
199 void ChatView::zoomIn() {
200 _currentScaleFactor *= 1.2;
202 scene()->setWidth(viewport()->width() / _currentScaleFactor - 2);
205 void ChatView::zoomOut() {
206 _currentScaleFactor /= 1.2;
207 scale(1 / 1.2, 1 / 1.2);
208 scene()->setWidth(viewport()->width() / _currentScaleFactor - 2);
211 void ChatView::zoomOriginal() {
212 scale(1/_currentScaleFactor, 1/_currentScaleFactor);
213 _currentScaleFactor = 1;
214 scene()->setWidth(viewport()->width() - 2);